diff --git a/include/libssh/buffer.h b/include/libssh/buffer.h
index 1fce7b76..d22178e7 100644
--- a/include/libssh/buffer.h
+++ b/include/libssh/buffer.h
@@ -42,10 +42,6 @@ int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len);
 
 void *ssh_buffer_allocate(struct ssh_buffer_struct *buffer, uint32_t len);
 int ssh_buffer_allocate_size(struct ssh_buffer_struct *buffer, uint32_t len);
-int ssh_buffer_pack_va(struct ssh_buffer_struct *buffer,
-                       const char *format,
-                       size_t argc,
-                       va_list ap);
 int _ssh_buffer_pack(struct ssh_buffer_struct *buffer,
                      const char *format,
                      size_t argc,
diff --git a/src/buffer.c b/src/buffer.c
index 299eac54..973fdf50 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -919,10 +919,11 @@ static int ssh_buffer_pack_allocate_va(struct ssh_buffer_struct *buffer,
  *                      SSH_ERROR on error
  * @see ssh_buffer_add_format() for format list values.
  */
-int ssh_buffer_pack_va(struct ssh_buffer_struct *buffer,
-                       const char *format,
-                       size_t argc,
-                       va_list ap)
+static int
+ssh_buffer_pack_va(struct ssh_buffer_struct *buffer,
+                   const char *format,
+                   size_t argc,
+                   va_list ap)
 {
     int rc = SSH_ERROR;
     const char *p;